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1983 280zx turbo runs better with chts unplugged


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(You knew you were going to get this one...)

 

Then, something else is wrong. 

 

The Factory Service Manual shows you how to test every component in the ECCS system on the L28ET.  The tests aren't hard and don't require special electronics.  All you need is a Harbor Freight Multimeter (and a little patience)...

 

Don't forget to check vacuum and intake leaks.  Most important - wiring and electrical connectors on the harness.  Make sure the wiring and connections are good from every part and / or sensor all the way to the ECU.  Double check all the ECU socket connectors and pins.  Clean and de-ozidize everything - then do it again...

 

Don't discount the possibility that someone in the past made other "adjustments" to that system to make it run - rather than finding the actual problem and repairing it...  And, most of all, HAVE FUN!

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